Image sensor with noise reduction
US9491383B2 · kind B2 · utility
5Cited by
3References
79Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2014 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Jun 5, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are disclosed for reducing reset noise in an image sensor. Voltage on the column read out is sensed during reset. When the voltage reaches a desired threshold level, a voltage is asserted on the column read out line that turns off the reset transistor. Using column circuitry to turn off the reset transistor may be used to reduce noise associated with the reset switch. In example embodiments, a comparator may be included on each column line to determine when the threshold voltage has been reached and to trigger the assertion of the turn off voltage on the column line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.